메타데이터
| 항목 |
값 |
| Designation |
C/2013 R1 (Lovejoy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-12-22T17:35:41.714880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:40Z |
| Obs used |
3894 |
| NEO |
- |
| M1 |
11.500 |
| K1 |
7.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-12-29.0000000 |
| e |
0.99842519 |
| q (au) |
0.811826 |
| a (au) |
515.505940 |
| i (deg) |
64.040953 |
| Ω (om, deg) |
70.711175 |
| ω (w, deg) |
67.166449 |
| M (ma, deg) |
0.000528 |
밝기
산란 + 전체 선형
$$
M_a = (11.126 + 5.399\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.126 |
| n |
5.399 |
| gf |
1.000 |
| gb |
-0.758 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2013-09-07 |
2013-12-22 |
+3.3697 |
-1.131 |
| 2013-12-22 |
2014-03-14 |
+1.6099 |
-2.730 |
| 2014-03-14 |
2014-09-14 |
+3.9594 |
-2.438 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
18:41:15.27 |
-66:37:43.4 |
HIP 91802 |
12.09 |
| 2026-07-29 12:00 |
18:41:06.52 |
-66:37:29.1 |
HIP 91802 |
12.97 |
| 2026-07-30 00:00 |
18:40:57.81 |
-66:37:14.4 |
HIP 91802 |
13.86 |
| 2026-07-30 12:00 |
18:40:49.14 |
-66:36:59.4 |
HIP 91802 |
14.75 |
| 2026-07-31 00:00 |
18:40:40.52 |
-66:36:44.0 |
HIP 91802 |
15.63 |
| 2026-07-31 12:00 |
18:40:31.94 |
-66:36:28.3 |
HIP 91802 |
16.52 |
| 2026-08-01 00:00 |
18:40:23.42 |
-66:36:12.3 |
HIP 91802 |
17.40 |
| 2026-08-01 12:00 |
18:40:14.94 |
-66:35:55.9 |
HIP 91802 |
18.28 |
| 2026-08-02 00:00 |
18:40:06.51 |
-66:35:39.1 |
HIP 91802 |
19.16 |
| 2026-08-02 12:00 |
18:39:58.13 |
-66:35:22.0 |
HIP 91802 |
20.04 |
| 2026-08-03 00:00 |
18:39:49.80 |
-66:35:04.6 |
HIP 91802 |
20.92 |
| 2026-08-03 12:00 |
18:39:41.51 |
-66:34:46.8 |
HIP 91802 |
21.79 |
| 2026-08-04 00:00 |
18:39:33.29 |
-66:34:28.8 |
HIP 91802 |
22.66 |
| 2026-08-04 12:00 |
18:39:25.11 |
-66:34:10.3 |
HIP 91802 |
23.53 |
| 2026-08-05 00:00 |
18:39:16.98 |
-66:33:51.6 |
HIP 91802 |
24.40 |
| 2026-08-05 12:00 |
18:39:08.91 |
-66:33:32.5 |
HIP 91230 |
24.90 |
| 2026-08-06 00:00 |
18:39:00.89 |
-66:33:13.1 |
HIP 91230 |
24.69 |
| 2026-08-06 12:00 |
18:38:52.93 |
-66:32:53.3 |
HIP 91230 |
24.52 |
| 2026-08-07 00:00 |
18:38:45.02 |
-66:32:33.3 |
HIP 91230 |
24.38 |
| 2026-08-07 12:00 |
18:38:37.17 |
-66:32:12.9 |
HIP 91230 |
24.28 |
| 2026-08-08 00:00 |
18:38:29.38 |
-66:31:52.2 |
HIP 91230 |
24.21 |
| 2026-08-08 12:00 |
18:38:21.64 |
-66:31:31.2 |
HIP 91230 |
24.18 |
| 2026-08-09 00:00 |
18:38:13.96 |
-66:31:09.9 |
HIP 91230 |
24.19 |
| 2026-08-09 12:00 |
18:38:06.34 |
-66:30:48.3 |
HIP 91230 |
24.23 |
| 2026-08-10 00:00 |
18:37:58.78 |
-66:30:26.3 |
HIP 91230 |
24.31 |
| 2026-08-10 12:00 |
18:37:51.28 |
-66:30:04.1 |
HIP 91230 |
24.42 |
| 2026-08-11 00:00 |
18:37:43.84 |
-66:29:41.5 |
HIP 91230 |
24.57 |
| 2026-08-11 12:00 |
18:37:36.46 |
-66:29:18.6 |
HIP 91035 |
23.81 |
| 2026-08-12 00:00 |
18:37:29.15 |
-66:28:55.5 |
HIP 91035 |
22.98 |
| 2026-08-12 12:00 |
18:37:21.89 |
-66:28:32.0 |
HIP 91035 |
22.16 |
| 2026-08-13 00:00 |
18:37:14.70 |
-66:28:08.3 |
HIP 91035 |
21.34 |
| 2026-08-13 12:00 |
18:37:07.58 |
-66:27:44.3 |
HIP 91035 |
20.53 |
| 2026-08-14 00:00 |
18:37:00.52 |
-66:27:19.9 |
HIP 91035 |
19.72 |
| 2026-08-14 12:00 |
18:36:53.52 |
-66:26:55.3 |
HIP 91035 |
18.91 |
| 2026-08-15 00:00 |
18:36:46.59 |
-66:26:30.4 |
HIP 91035 |
18.10 |
| 2026-08-15 12:00 |
18:36:39.72 |
-66:26:05.2 |
HIP 91035 |
17.30 |
| 2026-08-16 00:00 |
18:36:32.93 |
-66:25:39.8 |
HIP 91035 |
16.49 |
| 2026-08-16 12:00 |
18:36:26.20 |
-66:25:14.1 |
HIP 91035 |
15.70 |
| 2026-08-17 00:00 |
18:36:19.53 |
-66:24:48.1 |
HIP 91035 |
14.90 |
| 2026-08-17 12:00 |
18:36:12.94 |
-66:24:21.8 |
HIP 91035 |
14.11 |
| 2026-08-18 00:00 |
18:36:06.41 |
-66:23:55.3 |
HIP 91035 |
13.32 |
| 2026-08-18 12:00 |
18:35:59.96 |
-66:23:28.5 |
HIP 91035 |
12.54 |
| 2026-08-19 00:00 |
18:35:53.57 |
-66:23:01.4 |
HIP 91035 |
11.76 |